lkml.org 
[lkml]   [2008]   [Aug]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    SubjectRe: [PATCH 0/7] x86 dma_*_coherent rework patchset
    From
    On Tue, 12 Aug 2008 17:24:10 +0200
    Joerg Roedel <joerg.roedel@amd.com> wrote:

    > Hi,
    >
    > this patchset reworks the dma_*_coherent functions in the DMA layer for the x86
    > architecture. The patch series extends the existing DMA backends with missing
    > *coherent callbacks and simplifies the generic function to basically only call
    > the registered backend. This allows future optimizations in hardware specific
    > IOMMU implementations.
    > The code ist tested on AMD64 with AMD IOMMU and GART as well as on my old 486
    > box. It is not yet tested on a Calgary IOMMU system.
    >
    > Joerg
    >
    > git diff --stat tip/master:
    >
    > arch/x86/kernel/amd_iommu.c | 2 -
    > arch/x86/kernel/pci-calgary_64.c | 14 +++++
    > arch/x86/kernel/pci-dma.c | 116 +++----------------------------------
    > arch/x86/kernel/pci-gart_64.c | 31 ++++++++++
    > arch/x86/kernel/pci-nommu.c | 45 +++++++++++++++
    > 5 files changed, 100 insertions(+), 108 deletions(-)

    Really nice. I think that this is how other architectures that support
    multiple IOMMUs handle dma operations, and this is the right thing for
    x86 too.


    \
     
     \ /
      Last update: 2008-08-13 02:57    [W:0.021 / U:35.068 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site